Journal
CHIRALITY
Volume 29, Issue 2, Pages 97-102Publisher
WILEY
DOI: 10.1002/chir.22675
Keywords
chiral objects; chiral separation; screw; slender-body theory; vorticity direction
Funding
- National Natural Science Foundation of China [20804060]
- Research Foundation of Chongqing University of Science and Technology [CK2013B16]
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Chiral objects in shear flow experience a chirality-specific lift force. Shear flows past helices in a low Reynolds number regime were studied using slender-body theory. The chirality-specific lift forces in the vorticity direction experienced by helices are dominated by a set of helix geometry parameters: helix radius, pitch length, number of turns, and helix phase angle. Its analytical formula is given. The chirality-specific forces are the physical reasons for the chiral separation of helices in shear flow. Our results are well supported by the latest experimental observations.
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